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What Can You Do With Decorators?

Метки: python

Decorators allow you to inject or modify code in functions or classes. Sounds a bit like Aspect-Oriented Programming (AOP) in Java, doesn’t it? Except that it’s both much simpler and (as a result) much more powerful. For example, suppose you’d like to do something at the entry and exit points of a function (such as perform some kind of security, tracing, locking, etc. – all the standard arguments for AOP). With decorators, it looks like this:

@entryExit
def func1():
    print("inside func1()")

@entryExit
def func2():
    print("inside func2()")

The @ indicates the application of the decorator.